Roof still leaks

I rate this company 1 star. After purchasing a house who had work done by northern roofline with work still under warranty. I have had a couple of leaks. I asked for them to come out and check they said that their was nothing wrong. After that I had a skylight fitted by another company because northern roofline wanted me to cut the hole in the roof and pay one of their roofers £600 for 2 hours work to fit it. I also called them to tell them about a leak in the master bedroom they said that nobody was in the doncaster area and it would be about 9 weeks till they can get(well that's very poor when you have water leaking I to your bedroom with a roof that should have warranty is it. To top it off they never came out either When going up the roof I have seen how poorly the roof has been done, no drainage apart from a thumb size hole that drains in to the soil stack. Because the hole is so small it is easily blocked by leaves etc. The sarnifal roof is not even stuck properly to the ply and also it's that uneven it puddles over 3inches of water. I've posted a few photos to show the quality of work.